diff --git a/qt/CMakeLists.txt b/qt/CMakeLists.txt
index 3cdfe061a..bcee7004a 100644
--- a/qt/CMakeLists.txt
+++ b/qt/CMakeLists.txt
@@ -20,7 +20,6 @@ target_sources(${TR_NAME}-qt-lib
         ColumnResizer.h
         ComInteropHelper.cc
         ComInteropHelper.h
-        CustomVariantType.h
         DBusInteropHelper.cc
         DBusInteropHelper.h
         DetailsDialog.cc
@@ -109,6 +108,7 @@ target_sources(${TR_NAME}-qt-lib
         TrQtInit.cc
         TrQtInit.h
         Typedefs.h
+        UserMetaType.h
         Utils.cc
         Utils.h
         VariantHelpers.cc
diff --git a/qt/CustomVariantType.h b/qt/CustomVariantType.h
deleted file mode 100644
index 1d2727d7f..000000000
--- a/qt/CustomVariantType.h
+++ /dev/null
@@ -1,26 +0,0 @@
-// This file Copyright © Mnemosyne LLC.
-// It may be used under GPLv2 (SPDX: GPL-2.0-only), GPLv3 (SPDX: GPL-3.0-only),
-// or any future license endorsed by Mnemosyne LLC.
-// License text can be found in the licenses/ folder.
-
-#pragma once
-
-#include <libtransmission/transmission.h>
-
-#include <QVariant>
-
-class CustomVariantType
-{
-public:
-    enum
-    {
-        TrackerStatsList = QMetaType::User,
-        PeerList,
-        FileList,
-        ShowModeType,
-        SortModeType,
-        EncryptionModeType,
-    };
-};
-
-Q_DECLARE_METATYPE(tr_encryption_mode)
diff --git a/qt/Filters.h b/qt/Filters.h
index 7be3ee79d..d9a61a85a 100644
--- a/qt/Filters.h
+++ b/qt/Filters.h
@@ -5,20 +5,11 @@
 
 #pragma once
 
-#include <libtransmission-app/display-modes.h>
-
+#include "UserMetaType.h"
 #include "Torrent.h"
 
 // The Torrent properties that can affect ShowMode filtering.
 // When one of these changes, it's time to refilter.
 extern Torrent::fields_t const ShowModeFields;
 
-using ShowMode = transmission::app::ShowMode;
-Q_DECLARE_METATYPE(ShowMode)
-inline auto constexpr DefaultShowMode = transmission::app::DefaultShowMode;
-inline auto constexpr ShowModeCount = transmission::app::ShowModeCount;
 bool should_show_torrent(Torrent const& torrent, ShowMode);
-
-using SortMode = transmission::app::SortMode;
-Q_DECLARE_METATYPE(SortMode)
-inline auto constexpr DefaultSortMode = transmission::app::DefaultSortMode;
diff --git a/qt/Prefs.cc b/qt/Prefs.cc
index d7a730514..c6ede9744 100644
--- a/qt/Prefs.cc
+++ b/qt/Prefs.cc
@@ -18,9 +18,9 @@
 #include <libtransmission/serializer.h>
 #include <libtransmission/variant.h>
 
-#include "CustomVariantType.h"
 #include "Filters.h"
 #include "Prefs.h"
+#include "UserMetaType.h"
 
 namespace api_compat = libtransmission::api_compat;
 namespace ser = libtransmission::serializer;
@@ -43,13 +43,13 @@ template<typename T>
     case QMetaType::Int:
         return qvarFromOptional(ser::to_value<int64_t>(var));
 
-    case CustomVariantType::EncryptionModeType:
+    case UserMetaType::EncryptionModeType:
         return qvarFromOptional(ser::to_value<tr_encryption_mode>(var));
 
-    case CustomVariantType::SortModeType:
+    case UserMetaType::SortModeType:
         return qvarFromOptional(ser::to_value<SortMode>(var));
 
-    case CustomVariantType::ShowModeType:
+    case UserMetaType::ShowModeType:
         return qvarFromOptional(ser::to_value<ShowMode>(var));
 
     case QMetaType::QString:
@@ -80,13 +80,13 @@ template<typename T>
     case QMetaType::Int:
         return ser::to_variant(var.value<int>());
 
-    case CustomVariantType::EncryptionModeType:
+    case UserMetaType::EncryptionModeType:
         return ser::to_variant(var.value<tr_encryption_mode>());
 
-    case CustomVariantType::SortModeType:
+    case UserMetaType::SortModeType:
         return ser::to_variant(var.value<SortMode>());
 
-    case CustomVariantType::ShowModeType:
+    case UserMetaType::ShowModeType:
         return ser::to_variant(var.value<ShowMode>());
 
     case QMetaType::QString:
@@ -125,106 +125,6 @@ void ensureSoundCommandIsAList(tr_variant::Map& map)
 }
 } // namespace
 
-std::array<Prefs::PrefItem, Prefs::PREFS_COUNT> const Prefs::Items{
-    /* gui settings */
-    PrefItem{ OPTIONS_PROMPT, TR_KEY_show_options_window, QMetaType::Bool },
-    { OPEN_DIALOG_FOLDER, TR_KEY_open_dialog_dir, QMetaType::QString },
-    { INHIBIT_HIBERNATION, TR_KEY_inhibit_desktop_hibernation, QMetaType::Bool },
-    { DIR_WATCH, TR_KEY_watch_dir, QMetaType::QString },
-    { DIR_WATCH_ENABLED, TR_KEY_watch_dir_enabled, QMetaType::Bool },
-    { SHOW_TRAY_ICON, TR_KEY_show_notification_area_icon, QMetaType::Bool },
-    { START_MINIMIZED, TR_KEY_start_minimized, QMetaType::Bool },
-    { SHOW_NOTIFICATION_ON_ADD, TR_KEY_torrent_added_notification_enabled, QMetaType::Bool },
-    { SHOW_NOTIFICATION_ON_COMPLETE, TR_KEY_torrent_complete_notification_enabled, QMetaType::Bool },
-    { ASKQUIT, TR_KEY_prompt_before_exit, QMetaType::Bool },
-    { SORT_MODE, TR_KEY_sort_mode, CustomVariantType::SortModeType },
-    { SORT_REVERSED, TR_KEY_sort_reversed, QMetaType::Bool },
-    { COMPACT_VIEW, TR_KEY_compact_view, QMetaType::Bool },
-    { FILTERBAR, TR_KEY_show_filterbar, QMetaType::Bool },
-    { STATUSBAR, TR_KEY_show_statusbar, QMetaType::Bool },
-    { STATUSBAR_STATS, TR_KEY_statusbar_stats, QMetaType::QString },
-    { SHOW_TRACKER_SCRAPES, TR_KEY_show_tracker_scrapes, QMetaType::Bool },
-    { SHOW_BACKUP_TRACKERS, TR_KEY_show_backup_trackers, QMetaType::Bool },
-    { TOOLBAR, TR_KEY_show_toolbar, QMetaType::Bool },
-    { BLOCKLIST_DATE, TR_KEY_blocklist_date, QMetaType::QDateTime },
-    { BLOCKLIST_UPDATES_ENABLED, TR_KEY_blocklist_updates_enabled, QMetaType::Bool },
-    { MAIN_WINDOW_LAYOUT_ORDER, TR_KEY_main_window_layout_order, QMetaType::QString },
-    { MAIN_WINDOW_HEIGHT, TR_KEY_main_window_height, QMetaType::Int },
-    { MAIN_WINDOW_WIDTH, TR_KEY_main_window_width, QMetaType::Int },
-    { MAIN_WINDOW_X, TR_KEY_main_window_x, QMetaType::Int },
-    { MAIN_WINDOW_Y, TR_KEY_main_window_y, QMetaType::Int },
-    { FILTER_MODE, TR_KEY_filter_mode, CustomVariantType::ShowModeType },
-    { FILTER_TRACKERS, TR_KEY_filter_trackers, QMetaType::QString },
-    { FILTER_TEXT, TR_KEY_filter_text, QMetaType::QString },
-    { SESSION_IS_REMOTE, TR_KEY_remote_session_enabled, QMetaType::Bool },
-    { SESSION_REMOTE_HOST, TR_KEY_remote_session_host, QMetaType::QString },
-    { SESSION_REMOTE_HTTPS, TR_KEY_remote_session_https, QMetaType::Bool },
-    { SESSION_REMOTE_PASSWORD, TR_KEY_remote_session_password, QMetaType::QString },
-    { SESSION_REMOTE_PORT, TR_KEY_remote_session_port, QMetaType::Int },
-    { SESSION_REMOTE_AUTH, TR_KEY_remote_session_requires_authentication, QMetaType::Bool },
-    { SESSION_REMOTE_USERNAME, TR_KEY_remote_session_username, QMetaType::QString },
-    { SESSION_REMOTE_URL_BASE_PATH, TR_KEY_remote_session_url_base_path, QMetaType::QString },
-    { COMPLETE_SOUND_COMMAND, TR_KEY_torrent_complete_sound_command, QMetaType::QStringList },
-    { COMPLETE_SOUND_ENABLED, TR_KEY_torrent_complete_sound_enabled, QMetaType::Bool },
-    { READ_CLIPBOARD, TR_KEY_read_clipboard, QMetaType::Bool },
-
-    /* libtransmission settings */
-    { ALT_SPEED_LIMIT_UP, TR_KEY_alt_speed_up, QMetaType::Int },
-    { ALT_SPEED_LIMIT_DOWN, TR_KEY_alt_speed_down, QMetaType::Int },
-    { ALT_SPEED_LIMIT_ENABLED, TR_KEY_alt_speed_enabled, QMetaType::Bool },
-    { ALT_SPEED_LIMIT_TIME_BEGIN, TR_KEY_alt_speed_time_begin, QMetaType::Int },
-    { ALT_SPEED_LIMIT_TIME_END, TR_KEY_alt_speed_time_end, QMetaType::Int },
-    { ALT_SPEED_LIMIT_TIME_ENABLED, TR_KEY_alt_speed_time_enabled, QMetaType::Bool },
-    { ALT_SPEED_LIMIT_TIME_DAY, TR_KEY_alt_speed_time_day, QMetaType::Int },
-    { BLOCKLIST_ENABLED, TR_KEY_blocklist_enabled, QMetaType::Bool },
-    { BLOCKLIST_URL, TR_KEY_blocklist_url, QMetaType::QString },
-    { DEFAULT_TRACKERS, TR_KEY_default_trackers, QMetaType::QString },
-    { DSPEED, TR_KEY_speed_limit_down, QMetaType::Int },
-    { DSPEED_ENABLED, TR_KEY_speed_limit_down_enabled, QMetaType::Bool },
-    { DOWNLOAD_DIR, TR_KEY_download_dir, QMetaType::QString },
-    { DOWNLOAD_QUEUE_ENABLED, TR_KEY_download_queue_enabled, QMetaType::Bool },
-    { DOWNLOAD_QUEUE_SIZE, TR_KEY_download_queue_size, QMetaType::Int },
-    { ENCRYPTION, TR_KEY_encryption, CustomVariantType::EncryptionModeType },
-    { IDLE_LIMIT, TR_KEY_idle_seeding_limit, QMetaType::Int },
-    { IDLE_LIMIT_ENABLED, TR_KEY_idle_seeding_limit_enabled, QMetaType::Bool },
-    { INCOMPLETE_DIR, TR_KEY_incomplete_dir, QMetaType::QString },
-    { INCOMPLETE_DIR_ENABLED, TR_KEY_incomplete_dir_enabled, QMetaType::Bool },
-    { MSGLEVEL, TR_KEY_message_level, QMetaType::Int },
-    { PEER_LIMIT_GLOBAL, TR_KEY_peer_limit_global, QMetaType::Int },
-    { PEER_LIMIT_TORRENT, TR_KEY_peer_limit_per_torrent, QMetaType::Int },
-    { PEER_PORT, TR_KEY_peer_port, QMetaType::Int },
-    { PEER_PORT_RANDOM_ON_START, TR_KEY_peer_port_random_on_start, QMetaType::Bool },
-    { PEER_PORT_RANDOM_LOW, TR_KEY_peer_port_random_low, QMetaType::Int },
-    { PEER_PORT_RANDOM_HIGH, TR_KEY_peer_port_random_high, QMetaType::Int },
-    { QUEUE_STALLED_MINUTES, TR_KEY_queue_stalled_minutes, QMetaType::Int },
-    { SCRIPT_TORRENT_DONE_ENABLED, TR_KEY_script_torrent_done_enabled, QMetaType::Bool },
-    { SCRIPT_TORRENT_DONE_FILENAME, TR_KEY_script_torrent_done_filename, QMetaType::QString },
-    { SCRIPT_TORRENT_DONE_SEEDING_ENABLED, TR_KEY_script_torrent_done_seeding_enabled, QMetaType::Bool },
-    { SCRIPT_TORRENT_DONE_SEEDING_FILENAME, TR_KEY_script_torrent_done_seeding_filename, QMetaType::QString },
-    { SOCKET_DIFFSERV, TR_KEY_peer_socket_diffserv, QMetaType::QString },
-    { START, TR_KEY_start_added_torrents, QMetaType::Bool },
-    { TRASH_ORIGINAL, TR_KEY_trash_original_torrent_files, QMetaType::Bool },
-    { PEX_ENABLED, TR_KEY_pex_enabled, QMetaType::Bool },
-    { DHT_ENABLED, TR_KEY_dht_enabled, QMetaType::Bool },
-    { UTP_ENABLED, TR_KEY_utp_enabled, QMetaType::Bool },
-    { LPD_ENABLED, TR_KEY_lpd_enabled, QMetaType::Bool },
-    { PORT_FORWARDING, TR_KEY_port_forwarding_enabled, QMetaType::Bool },
-    { PREALLOCATION, TR_KEY_preallocation, QMetaType::Int },
-    { RATIO, TR_KEY_ratio_limit, QMetaType::Double },
-    { RATIO_ENABLED, TR_KEY_ratio_limit_enabled, QMetaType::Bool },
-    { RENAME_PARTIAL_FILES, TR_KEY_rename_partial_files, QMetaType::Bool },
-    { RPC_AUTH_REQUIRED, TR_KEY_rpc_authentication_required, QMetaType::Bool },
-    { RPC_ENABLED, TR_KEY_rpc_enabled, QMetaType::Bool },
-    { RPC_PASSWORD, TR_KEY_rpc_password, QMetaType::QString },
-    { RPC_PORT, TR_KEY_rpc_port, QMetaType::Int },
-    { RPC_USERNAME, TR_KEY_rpc_username, QMetaType::QString },
-    { RPC_WHITELIST_ENABLED, TR_KEY_rpc_whitelist_enabled, QMetaType::Bool },
-    { RPC_WHITELIST, TR_KEY_rpc_whitelist, QMetaType::QString },
-    { USPEED_ENABLED, TR_KEY_speed_limit_up_enabled, QMetaType::Bool },
-    { USPEED, TR_KEY_speed_limit_up, QMetaType::Int },
-    { UPLOAD_SLOTS_PER_TORRENT, TR_KEY_upload_slots_per_torrent, QMetaType::Int },
-};
-
 namespace
 {
 [[nodiscard]] constexpr auto prefIsSavable(int pref)
diff --git a/qt/Prefs.h b/qt/Prefs.h
index c6210f642..74598b2f5 100644
--- a/qt/Prefs.h
+++ b/qt/Prefs.h
@@ -16,6 +16,8 @@
 
 #include <libtransmission-app/display-modes.h>
 
+#include "UserMetaType.h"
+
 class Prefs : public QObject
 {
     Q_OBJECT
@@ -191,7 +193,105 @@ private:
         int type;
     };
 
-    static std::array<PrefItem, PREFS_COUNT> const Items;
+    static inline auto constexpr Items = std::array<PrefItem, PREFS_COUNT>{ {
+        // gui settings
+        { OPTIONS_PROMPT, TR_KEY_show_options_window, QMetaType::Bool },
+        { OPEN_DIALOG_FOLDER, TR_KEY_open_dialog_dir, QMetaType::QString },
+        { INHIBIT_HIBERNATION, TR_KEY_inhibit_desktop_hibernation, QMetaType::Bool },
+        { DIR_WATCH, TR_KEY_watch_dir, QMetaType::QString },
+        { DIR_WATCH_ENABLED, TR_KEY_watch_dir_enabled, QMetaType::Bool },
+        { SHOW_TRAY_ICON, TR_KEY_show_notification_area_icon, QMetaType::Bool },
+        { START_MINIMIZED, TR_KEY_start_minimized, QMetaType::Bool },
+        { SHOW_NOTIFICATION_ON_ADD, TR_KEY_torrent_added_notification_enabled, QMetaType::Bool },
+        { SHOW_NOTIFICATION_ON_COMPLETE, TR_KEY_torrent_complete_notification_enabled, QMetaType::Bool },
+        { ASKQUIT, TR_KEY_prompt_before_exit, QMetaType::Bool },
+        { SORT_MODE, TR_KEY_sort_mode, UserMetaType::SortModeType },
+        { SORT_REVERSED, TR_KEY_sort_reversed, QMetaType::Bool },
+        { COMPACT_VIEW, TR_KEY_compact_view, QMetaType::Bool },
+        { FILTERBAR, TR_KEY_show_filterbar, QMetaType::Bool },
+        { STATUSBAR, TR_KEY_show_statusbar, QMetaType::Bool },
+        { STATUSBAR_STATS, TR_KEY_statusbar_stats, QMetaType::QString },
+        { SHOW_TRACKER_SCRAPES, TR_KEY_show_tracker_scrapes, QMetaType::Bool },
+        { SHOW_BACKUP_TRACKERS, TR_KEY_show_backup_trackers, QMetaType::Bool },
+        { TOOLBAR, TR_KEY_show_toolbar, QMetaType::Bool },
+        { BLOCKLIST_DATE, TR_KEY_blocklist_date, QMetaType::QDateTime },
+        { BLOCKLIST_UPDATES_ENABLED, TR_KEY_blocklist_updates_enabled, QMetaType::Bool },
+        { MAIN_WINDOW_LAYOUT_ORDER, TR_KEY_main_window_layout_order, QMetaType::QString },
+        { MAIN_WINDOW_HEIGHT, TR_KEY_main_window_height, QMetaType::Int },
+        { MAIN_WINDOW_WIDTH, TR_KEY_main_window_width, QMetaType::Int },
+        { MAIN_WINDOW_X, TR_KEY_main_window_x, QMetaType::Int },
+        { MAIN_WINDOW_Y, TR_KEY_main_window_y, QMetaType::Int },
+        { FILTER_MODE, TR_KEY_filter_mode, UserMetaType::ShowModeType },
+        { FILTER_TRACKERS, TR_KEY_filter_trackers, QMetaType::QString },
+        { FILTER_TEXT, TR_KEY_filter_text, QMetaType::QString },
+        { SESSION_IS_REMOTE, TR_KEY_remote_session_enabled, QMetaType::Bool },
+        { SESSION_REMOTE_HOST, TR_KEY_remote_session_host, QMetaType::QString },
+        { SESSION_REMOTE_HTTPS, TR_KEY_remote_session_https, QMetaType::Bool },
+        { SESSION_REMOTE_PASSWORD, TR_KEY_remote_session_password, QMetaType::QString },
+        { SESSION_REMOTE_PORT, TR_KEY_remote_session_port, QMetaType::Int },
+        { SESSION_REMOTE_AUTH, TR_KEY_remote_session_requires_authentication, QMetaType::Bool },
+        { SESSION_REMOTE_USERNAME, TR_KEY_remote_session_username, QMetaType::QString },
+        { SESSION_REMOTE_URL_BASE_PATH, TR_KEY_remote_session_url_base_path, QMetaType::QString },
+        { COMPLETE_SOUND_COMMAND, TR_KEY_torrent_complete_sound_command, QMetaType::QStringList },
+        { COMPLETE_SOUND_ENABLED, TR_KEY_torrent_complete_sound_enabled, QMetaType::Bool },
+        { READ_CLIPBOARD, TR_KEY_read_clipboard, QMetaType::Bool },
+
+        /* libtransmission settings */
+        { ALT_SPEED_LIMIT_UP, TR_KEY_alt_speed_up, QMetaType::Int },
+        { ALT_SPEED_LIMIT_DOWN, TR_KEY_alt_speed_down, QMetaType::Int },
+        { ALT_SPEED_LIMIT_ENABLED, TR_KEY_alt_speed_enabled, QMetaType::Bool },
+        { ALT_SPEED_LIMIT_TIME_BEGIN, TR_KEY_alt_speed_time_begin, QMetaType::Int },
+        { ALT_SPEED_LIMIT_TIME_END, TR_KEY_alt_speed_time_end, QMetaType::Int },
+        { ALT_SPEED_LIMIT_TIME_ENABLED, TR_KEY_alt_speed_time_enabled, QMetaType::Bool },
+        { ALT_SPEED_LIMIT_TIME_DAY, TR_KEY_alt_speed_time_day, QMetaType::Int },
+        { BLOCKLIST_ENABLED, TR_KEY_blocklist_enabled, QMetaType::Bool },
+        { BLOCKLIST_URL, TR_KEY_blocklist_url, QMetaType::QString },
+        { DEFAULT_TRACKERS, TR_KEY_default_trackers, QMetaType::QString },
+        { DSPEED, TR_KEY_speed_limit_down, QMetaType::Int },
+        { DSPEED_ENABLED, TR_KEY_speed_limit_down_enabled, QMetaType::Bool },
+        { DOWNLOAD_DIR, TR_KEY_download_dir, QMetaType::QString },
+        { DOWNLOAD_QUEUE_ENABLED, TR_KEY_download_queue_enabled, QMetaType::Bool },
+        { DOWNLOAD_QUEUE_SIZE, TR_KEY_download_queue_size, QMetaType::Int },
+        { ENCRYPTION, TR_KEY_encryption, UserMetaType::EncryptionModeType },
+        { IDLE_LIMIT, TR_KEY_idle_seeding_limit, QMetaType::Int },
+        { IDLE_LIMIT_ENABLED, TR_KEY_idle_seeding_limit_enabled, QMetaType::Bool },
+        { INCOMPLETE_DIR, TR_KEY_incomplete_dir, QMetaType::QString },
+        { INCOMPLETE_DIR_ENABLED, TR_KEY_incomplete_dir_enabled, QMetaType::Bool },
+        { MSGLEVEL, TR_KEY_message_level, QMetaType::Int },
+        { PEER_LIMIT_GLOBAL, TR_KEY_peer_limit_global, QMetaType::Int },
+        { PEER_LIMIT_TORRENT, TR_KEY_peer_limit_per_torrent, QMetaType::Int },
+        { PEER_PORT, TR_KEY_peer_port, QMetaType::Int },
+        { PEER_PORT_RANDOM_ON_START, TR_KEY_peer_port_random_on_start, QMetaType::Bool },
+        { PEER_PORT_RANDOM_LOW, TR_KEY_peer_port_random_low, QMetaType::Int },
+        { PEER_PORT_RANDOM_HIGH, TR_KEY_peer_port_random_high, QMetaType::Int },
+        { QUEUE_STALLED_MINUTES, TR_KEY_queue_stalled_minutes, QMetaType::Int },
+        { SCRIPT_TORRENT_DONE_ENABLED, TR_KEY_script_torrent_done_enabled, QMetaType::Bool },
+        { SCRIPT_TORRENT_DONE_FILENAME, TR_KEY_script_torrent_done_filename, QMetaType::QString },
+        { SCRIPT_TORRENT_DONE_SEEDING_ENABLED, TR_KEY_script_torrent_done_seeding_enabled, QMetaType::Bool },
+        { SCRIPT_TORRENT_DONE_SEEDING_FILENAME, TR_KEY_script_torrent_done_seeding_filename, QMetaType::QString },
+        { SOCKET_DIFFSERV, TR_KEY_peer_socket_diffserv, QMetaType::QString },
+        { START, TR_KEY_start_added_torrents, QMetaType::Bool },
+        { TRASH_ORIGINAL, TR_KEY_trash_original_torrent_files, QMetaType::Bool },
+        { PEX_ENABLED, TR_KEY_pex_enabled, QMetaType::Bool },
+        { DHT_ENABLED, TR_KEY_dht_enabled, QMetaType::Bool },
+        { UTP_ENABLED, TR_KEY_utp_enabled, QMetaType::Bool },
+        { LPD_ENABLED, TR_KEY_lpd_enabled, QMetaType::Bool },
+        { PORT_FORWARDING, TR_KEY_port_forwarding_enabled, QMetaType::Bool },
+        { PREALLOCATION, TR_KEY_preallocation, QMetaType::Int },
+        { RATIO, TR_KEY_ratio_limit, QMetaType::Double },
+        { RATIO_ENABLED, TR_KEY_ratio_limit_enabled, QMetaType::Bool },
+        { RENAME_PARTIAL_FILES, TR_KEY_rename_partial_files, QMetaType::Bool },
+        { RPC_AUTH_REQUIRED, TR_KEY_rpc_authentication_required, QMetaType::Bool },
+        { RPC_ENABLED, TR_KEY_rpc_enabled, QMetaType::Bool },
+        { RPC_PASSWORD, TR_KEY_rpc_password, QMetaType::QString },
+        { RPC_PORT, TR_KEY_rpc_port, QMetaType::Int },
+        { RPC_USERNAME, TR_KEY_rpc_username, QMetaType::QString },
+        { RPC_WHITELIST_ENABLED, TR_KEY_rpc_whitelist_enabled, QMetaType::Bool },
+        { RPC_WHITELIST, TR_KEY_rpc_whitelist, QMetaType::QString },
+        { USPEED_ENABLED, TR_KEY_speed_limit_up_enabled, QMetaType::Bool },
+        { USPEED, TR_KEY_speed_limit_up, QMetaType::Int },
+        { UPLOAD_SLOTS_PER_TORRENT, TR_KEY_upload_slots_per_torrent, QMetaType::Int },
+    } };
 
     [[nodiscard]] static tr_variant::Map defaults();
 
diff --git a/qt/PrefsDialog.cc b/qt/PrefsDialog.cc
index eb4df9682..a162c67f1 100644
--- a/qt/PrefsDialog.cc
+++ b/qt/PrefsDialog.cc
@@ -27,11 +27,11 @@
 #include <libtransmission/transmission.h>
 
 #include "ColumnResizer.h"
-#include "CustomVariantType.h"
 #include "Formatter.h"
 #include "FreeSpaceLabel.h"
 #include "Prefs.h"
 #include "Session.h"
+#include "UserMetaType.h"
 #include "Utils.h"
 
 using namespace libtransmission;
diff --git a/qt/Session.cc b/qt/Session.cc
index 0cd54d497..ba9e54051 100644
--- a/qt/Session.cc
+++ b/qt/Session.cc
@@ -35,12 +35,12 @@
 #include "Session.h"
 
 #include "AddData.h"
-#include "CustomVariantType.h"
 #include "Filters.h"
 #include "Prefs.h"
 #include "RpcQueue.h"
 #include "SessionDialog.h"
 #include "Torrent.h"
+#include "UserMetaType.h"
 #include "VariantHelpers.h"
 
 using namespace std::literals;
@@ -82,7 +82,7 @@ void Session::sessionSet(tr_quark const key, QVariant const& value)
         dictAdd(&args, key, value.toString());
         break;
 
-    case CustomVariantType::EncryptionModeType:
+    case UserMetaType::EncryptionModeType:
         *tr_variantDictAdd(&args, key) = to_variant(value.value<tr_encryption_mode>());
         break;
 
@@ -923,7 +923,7 @@ void Session::updateInfo(tr_variant* args_dict)
 
             break;
 
-        case CustomVariantType::EncryptionModeType:
+        case UserMetaType::EncryptionModeType:
             if (auto const val = to_value<tr_encryption_mode>(*b))
             {
                 prefs_.set(i, *val);
diff --git a/qt/UserMetaType.h b/qt/UserMetaType.h
new file mode 100644
index 000000000..e30507692
--- /dev/null
+++ b/qt/UserMetaType.h
@@ -0,0 +1,34 @@
+// This file Copyright © Mnemosyne LLC.
+// It may be used under GPLv2 (SPDX: GPL-2.0-only), GPLv3 (SPDX: GPL-3.0-only),
+// or any future license endorsed by Mnemosyne LLC.
+// License text can be found in the licenses/ folder.
+
+#pragma once
+
+#include <libtransmission/transmission.h>
+
+#include <libtransmission-app/display-modes.h>
+
+#include <QMetaType>
+
+class UserMetaType
+{
+public:
+    enum
+    {
+        ShowModeType = QMetaType::User,
+        SortModeType,
+        EncryptionModeType,
+    };
+};
+
+Q_DECLARE_METATYPE(tr_encryption_mode)
+
+using ShowMode = transmission::app::ShowMode;
+Q_DECLARE_METATYPE(ShowMode)
+inline auto constexpr DefaultShowMode = transmission::app::DefaultShowMode;
+inline auto constexpr ShowModeCount = transmission::app::ShowModeCount;
+
+using SortMode = transmission::app::SortMode;
+Q_DECLARE_METATYPE(SortMode)
+inline auto constexpr DefaultSortMode = transmission::app::DefaultSortMode;
diff --git a/tests/qt/prefs-test.cc b/tests/qt/prefs-test.cc
index 5b4268f33..4126ce155 100644
--- a/tests/qt/prefs-test.cc
+++ b/tests/qt/prefs-test.cc
@@ -18,8 +18,6 @@
 #include <libtransmission/utils.h>
 #include <libtransmission/variant.h>
 
-#include "CustomVariantType.h"
-#include "Filters.h"
 #include "Prefs.h"
 #include "TrQtInit.h"